Self-locking structure of fire-fighting water valve

Abstract

The utility model discloses a fire-fighting water valve self-locking structure, and relates to the field of fire-fighting water valves, the fire-fighting water valve self-locking structure comprises a self-locking assembly arranged on a fire-fighting water valve, the self-locking assembly is used for limiting opening of the fire-fighting water valve, the fire-fighting water valve comprises a valve seat and a valve rod, and the valve rod can rotate relative to the valve seat to control opening and closing of the fire-fighting water valve. The self-locking check valve is characterized in that the self-locking assembly comprises a ratchet wheel and a pawl, the ratchet wheel is coaxially and fixedly connected to the valve rod, the pawl is rotationally connected to the valve seat, the valve seat is provided with a torsional spring used for driving the pawl to rotate so as to be clamped into a tooth groove of the ratchet wheel, and the ratchet wheel is fixedly connected to the valve rod. By arranging the ratchet wheel and the pawl and controlling the elastic coefficient of the torsional spring, the pawl cannot be easily separated from the ratchet wheel tooth groove, so that the possibility that the fire water valve is opened by mistake can be reduced, and meanwhile timely opening of the fire water valve is basically not affected.

Description

Technical Field

[0001] The present application relates to the field of fire water valves, and in particular to a fire water valve self-locking structure. Background Art

[0002] At present, fire water valves are generally opened by hand wheels. For some fire water valves installed outdoors, since the hand wheels can rotate freely, some children often play with the hand wheels, causing the fire water valves to open by mistake, resulting in a waste of water resources.

[0003] In the related art, there are some handwheel self-locking structures, such as being equipped with a special lock and then placing the key in a certain place, but this requires a special person to open it, such as someone who needs to know where the key is placed. At the same time, during long-term use, the key is also easy to be lost, resulting in the fire water valve cannot be opened in time when needed. Utility Model Content

[0004] In order to facilitate timely opening of the fire water valve while reducing the possibility of accidental opening of the fire water valve, the present application provides a self-locking structure for a fire water valve.

[0005] The present application provides a fire water valve self-locking structure, which adopts the following technical solution:

[0006] A fire water valve self-locking structure comprises a self-locking component for being arranged on the fire water valve, the self-locking component is used to limit the opening of the fire water valve, the fire water valve comprises a valve seat and a valve stem, the valve stem can rotate relative to the valve seat to control the opening and closing of the fire water valve, a hand wheel is installed on the upper end of the valve stem, the self-locking component comprises a ratchet and a pawl, the ratchet is coaxially fixedly connected to the valve stem, the pawl is rotatably connected to the valve seat, and the valve seat is provided with a torsion spring for driving the pawl to rotate so as to engage in the ratchet tooth groove.

[0007] By adopting the above technical solution, under normal circumstances, the ratchet is stuck in the ratchet tooth groove, thereby limiting the rotation of the ratchet and then limiting the rotation of the valve stem, so that the handwheel cannot be rotated to open the fire water valve. When the fire water valve needs to be opened, the ratchet is pulled to disengage the ratchet tooth groove, and the handwheel can be rotated to open the fire water valve. By setting the ratchet and the ratchet and controlling the elastic coefficient of the torsion spring, the ratchet cannot be easily disengaged from the ratchet tooth groove, thereby reducing the possibility of accidental opening of the fire water valve, and at the same time basically does not affect the timely opening of the fire water valve.

[0008] Optionally, the fire water valve is also provided with a driving member for driving the pawl to disengage from the ratchet tooth groove.

[0009] By adopting the above technical solution, the driving member can drive the ratchet to disengage from the tooth groove, thereby facilitating the timely opening of the fire water valve.

[0010] Optionally, the driving member includes a pressing block, a pressing groove is provided on the handwheel, the pressing block is inserted into the pressing groove, a spring is provided in the pressing groove for driving the pressing block to be partially located outside the pressing groove, a sleeve is hinged on the valve seat, an extension rod is slidably inserted in the sleeve, one end of the extension rod extending out of the sleeve is hinged to the ratchet, and the pressing groove is connected to the sleeve through an airway.

[0011] By adopting the above technical solution, when the ratchet is driven to rotate, the pressing block is pressed, and the gas in the pressing groove enters the sleeve through the airway, thereby moving the extension rod, and then driving the ratchet to rotate. The pressing block is set on the hand wheel. When the operator opens the fire water valve, he holds the hand wheel and presses the pressing block into the pressing groove to open the fire water valve. The driving component has a simple structure and is easy to operate.

[0012] Optionally, a mounting ring is fixedly connected to the valve seat, the mounting ring is sleeved on the valve stem, an annular groove is opened in the mounting ring, the sleeve is connected to the annular groove, and the pressing groove is connected to the annular groove through an airway.

[0013] By adopting the above technical solution and setting the annular groove on the mounting ring, during the rotation of the valve stem, the pressing groove can be connected to the annular groove through the airway and then connected to the sleeve, making the device structure simpler.

[0014] Optionally, the pressing groove is opened on the lower side of the hand wheel.

[0015] By adopting the above technical solution, other people can be prevented from pressing the pressing block by mistake.

[0016] Optionally, a plurality of pressing blocks are arranged along the circumference of the hand wheel.

[0017] By adopting the above technical solution, when it is necessary to open the fire water valve, it is convenient for the operator to press the pressing block at multiple positions.

[0018] Optionally, the lower surface of the pressing block is an arc-shaped convex surface.

[0019] By adopting the above technical solution, it is convenient for operators to press the pressing block.

[0020] Optionally, the driving member includes a pull rope, and the pull rope is fixedly connected to the pawl.

[0021] By adopting the above technical solution, when the ratchet is driven to rotate, the pull rope can be pulled.

[0022] In summary, this application includes the following beneficial technical effects:

[0023] 1. The present application can prevent the pawl from easily disengaging from the ratchet tooth groove by setting the ratchet and the pawl and controlling the elastic coefficient of the torsion spring, thereby reducing the possibility of the fire water valve opening by mistake and basically not affecting the timely opening of the fire water valve;

[0024] 2. The application provides a pressing block, which makes it easy for the operator to press the pressing block and turn the hand wheel at the same time, thereby facilitating the rapid opening of the fire water valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a fire water valve self-locking structure embodiment 1 disclosed in the present application;

[0026] Figure 2 yes Figure 1 A partial structural cross-sectional view;

[0027] Figure 3 yes Figure 1 A cross-sectional view of the middle sleeve and the extension rod;

[0028] Figure 4 It is a schematic diagram of the overall structure of a fire water valve self-locking structure embodiment 2 disclosed in the present application.

[0029] Description of reference numerals:

[0030] 1. Valve seat; 2. Valve stem; 3. Handwheel; 4. Connecting rod; 5. Mounting ring; 6. Ratchet; 7. Ratchet; 8. Torsion spring; 9. Fixed bracket; 10. Airway; 11. Annular groove; 12. Air pipe; 13. Sleeve; 14. Extension rod; 15. Pull rope; 16. Pull ring; 17. Press block; 18. Press groove; 19. Spring; 20. Piston plate. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The application discloses a fire water valve self-locking structure.

[0033] Embodiment 1;

[0034] Reference Figure 1 and Figure 2 A fire water valve self-locking structure includes a self-locking component for being arranged on the fire water valve, the self-locking component is used to limit the opening of the fire water valve, the fire water valve adopts a ball valve, the fire water valve includes a valve seat 1 and a valve stem 2, the valve stem 2 can rotate relative to the valve seat 1 to control the opening and closing of the fire water valve, and a hand wheel 3 is installed on the upper end of the valve stem 2.

[0035] The self-locking component includes a ratchet 6 and a pawl 7. The ratchet 6 is coaxially fixedly connected to the valve stem 2. A mounting ring 5 is fixedly connected to the valve seat 1. The mounting ring 5 is sleeved on the valve stem 2. A fixing frame 9 is fixedly connected to the mounting ring 5. The pawl 7 is rotatably connected to the fixing frame 9. The rotation axis of the pawl 7 is arranged in the vertical direction. A torsion spring 8 is sleeved and fixedly connected to the fixing frame 9. The torsion spring 8 and the pawl 7 are fixedly connected. When the pawl 7 is stuck in the tooth groove of the ratchet 6, the torsion spring 8 does not deform.

[0036] Reference Figure 2 and Figure 3 , a driving member for driving the pawl 7 to rotate is provided on the mounting ring 5, and the driving member includes a plurality of pressing blocks 17, and the plurality of pressing blocks 17 are arranged at intervals along the circumference of the hand wheel 3. In the present embodiment, four pressing blocks 17 are provided, and a pressing groove 18 for vertically inserting the pressing block 17 is provided on the lower surface of the hand wheel 3. A spring 19 is fixedly connected in the pressing groove 18, and the spring 19 is fixedly connected to the pressing block 17. The length direction of the spring 19 is arranged in the vertical direction. When the spring 19 is not deformed, the pressing block 17 is partially located outside the pressing groove 18;

[0037] A plurality of connecting rods 4 are fixedly connected to the inner wall of the hand wheel 3. The number of the connecting rods 4 is consistent with the number of the pressing blocks 17 and corresponds one to one. The connecting rods 4 are fixedly connected to the valve stem 2. An air passage 10 is provided in the connecting rod 4 and the valve stem 2. The air passage 10 is connected to the pressing groove 18. An annular groove 11 is provided on the mounting ring 5. The annular groove 11 is connected to the air passage 10.

[0038] A telescopic rod is hinged on the fixed frame 9, and the telescopic rod includes a sleeve 13 and an extension rod 14. One end of the sleeve 13 is hinged on the fixed frame 9, and the other end of the sleeve 13 is sleeved with the extension rod 14. One end of the extension rod 14 extending out of the sleeve 13 is hinged to the pawl 7, and the annular groove 11 is connected to the sleeve 13 through the air pipe 12. A piston plate 20 is provided in the sleeve 13, and the piston plate 20 can move along the length direction of the sleeve 13. One end of the extension rod 14 inserted in the sleeve 13 is fixedly connected to the piston plate 20, and the air pipe 12 is connected to the sleeve 13 on the side of the piston plate 20 close to the extension rod 14.

[0039] In this embodiment, the lower surface of the pressing block 17 is configured as an arc-shaped convex surface.

[0040] The implementation principle of Example 1 of a fire water valve self-locking structure disclosed in the present application is: when the fire water valve is closed, the hand wheel 3 cannot be rotated because the pawl 7 is stuck in the tooth groove of the ratchet 6. At this time, due to the setting of the pressing block 17, it is difficult for other personnel to accidentally turn the hand wheel 3, causing the fire water valve to open, thereby avoiding waste of water resources. When the hand wheel 3 needs to be turned, the pressing block 17 is pressed to push the gas in the pressing groove 18 into the sleeve 13 through the airway 10 and the gas, so that the extension rod 14 slides, thereby driving the pawl 7 to rotate. After the pawl 7 is disengaged from the tooth groove of the ratchet 6, the hand wheel 3 can rotate normally.

[0041] Embodiment 2;

[0042] Reference Figure 4 The difference between this embodiment and embodiment 1 is that the driving member includes a pull rope 15, one end of the pull rope 15 is fixed on the pawl 7, and the other end of the pull rope 15 is fixedly connected to a pull ring 16.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fire water valve self-locking structure, comprising a self-locking component for being arranged on the fire water valve, the self-locking component is used to limit the opening of the fire water valve, the fire water valve comprises a valve seat (1) and a valve stem (2), the valve stem (2) can rotate relative to the valve seat (1) to control the opening and closing of the fire water valve, and a hand wheel (3) is installed on the upper end of the valve stem (2), characterized in that: The self-locking assembly comprises a ratchet (6) and a pawl (7); the ratchet (6) is coaxially fixedly connected to the valve stem (2); the pawl (7) is rotatably connected to the valve seat (1); and the valve seat (1) is provided with a torsion spring (8) for driving the pawl (7) to rotate so as to engage in a tooth groove of the ratchet (6).

2. A fire water valve self-locking structure according to claim 1, characterized in that: The fire water valve is also provided with a driving member for driving the ratchet pawl (7) to disengage from the tooth groove of the ratchet wheel (6).

3. A fire water valve self-locking structure according to claim 2, characterized in that: The driving member comprises a pressing block (17), a pressing groove (18) is provided on the hand wheel (3), the pressing block (17) is inserted into the pressing groove (18), a spring (19) is provided in the pressing groove (18) for driving the pressing block (17) to be partially located outside the pressing groove (18), a sleeve (13) is hinged on the valve seat (1), an extension rod (14) is slidably inserted in the sleeve (13), one end of the extension rod (14) extending out of the sleeve (13) is hinged to the ratchet (7), and the pressing groove (18) is connected to the sleeve (13) through an air passage (10).

4. A fire water valve self-locking structure according to claim 3, characterized in that: A mounting ring (5) is fixedly connected to the valve seat (1), the mounting ring (5) is sleeved on the valve stem (2), an annular groove (11) is provided in the mounting ring (5), the sleeve (13) is connected to the annular groove (11), and the pressing groove (18) is connected to the annular groove (11) through an air passage (10).

5. A fire water valve self-locking structure according to claim 3, characterized in that: The pressing groove (18) is provided on the lower side of the hand wheel (3).

6. A fire water valve self-locking structure according to claim 3, characterized in that: A plurality of pressing blocks (17) are arranged along the circumference of the hand wheel (3).

7. A fire water valve self-locking structure according to claim 3, characterized in that: The lower surface of the pressing block (17) is an arc-shaped convex surface.

8. A fire water valve self-locking structure according to claim 3, characterized in that: The driving member comprises a pull rope (15), and the pull rope (15) is fixedly connected to the ratchet pawl (7).

Images